Improvement jn gage-cocks



- 2 Sheets-Shut I H. 0. MONTGOMERY.

Gage-000k.

No. 222,361. Patented Dec. 9, I879.

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TED STAT-Es PATENT OFFICE! HENRY C. MONTGOMERY, OF CLEVELAND, OHIO.

IMPROVEMENT lNI'GAGE-COCKS.

Specification forming part of Letters Patent No- 222381, dated December 9, 1879; application file September'l7, 1879.

To all whom it may concern Beit known that I,'HENn-YG. MONTGOMERY, of Cleveland, in the county of (Juyahoga and State of Ohio, have invented certain new and useful Improvements in Gage-(locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to -the accompanying drawings, which form part of this specification.

My invention relates to steam-escape valves adapted for use either as safety-valves or gagecocks; and it consists in the combination, with a vent-stem, of a tubular or cylindrical valve having a removable end and fitting over and slidinglongitudinally upon said vent-stem, said valve held in position so as to prevent the escape of steam by the force of a spring or weight adapted to yield to steam-pressure upon the valve.

In the drawings, Figure 1 represents a form of my device as constructed for use as a gagecock. Fig. 2 represents my device as it might be used for a safety-valve; and Fig. 3 shows a form of my device wherein a spring instead yof a weight may be employed for acting upon the valve.

Fig. 4 is a dissected view. In the said drawings, A is a vent-stem, suit ably constructed to be screwed or otherwise attached to a steam-boiler. This vent-stem is hollow throughoutits length. Fitting over its discharge end is a thimble or cap, B, provided with a vent, B, for the escape of steam.

The closed end of the thimble or cap B, abutting against the discharge end of the vent-stem A, operates as a valve to prevent or permit the escape of steam from the boiler through the vent-stem. At the point of juncture between the closed end of the thimble or cap B and the when the thimble B is moved away from the discharging-aperture of the vent-stem A, then steam will escape within the chamber of the thimble B and out through its vent B without splashing or spattering.

D is a weight, operating upon one end of a lever, D, which is fulcrumed upon'thevent stem A, the other end of which lever is so connected with the thimble B that the gravity of the weight- D, through the lever D, shalI tend at all times to close the thimble-valveB against the discharge-outlet of the vent-stem A.

I11 case my device should be used as a safetyvalve, the weight D should be adjustably connected with a graduated lever, as shown in Fig. 2, upon which graduated lever figures should be formed which shall indicate the point where the weight D should be adjusted in order to allow the thimble-valve B to yield and permit the escape of steam through the vent-stem A at any desired pressure.

When used as a gage-cock, such a construction of device would not be required, as the form shown in Fig. l of the drawings will serve a sufficiently useful purpose, for in this case the weight D is designed to be operated by hand, to be lifted whenever it is desired to test the boiler in the manner commonly tested by gage-cocks.

In order to prevent, under any circumstances,

the weight D from rising too high, and thus causing the valve B to be moved too much,

any suitable stop, D or its equivalent, may be employed.

I have thus far described my device as operated with the gravity-weight D. I may, however, employ spring-pressure upon the thimble-valve B, if so desired; and Fig. 3 of the drawings illustrates oneform of device wherein a spring may be substituted for the weight D.

In such a case the mere form of device is a matter to which I do not in any degree confine myself. That shown in Fig. 3 consists in prolonging the vent-stem A into a frame, A, through which shall pass-an adjusting-screw, f A for regulating the tension of a spring, A

which shall exert its pressure against the thimble-valve B, thus operating'in exactly the same manner as already specified for the weight 1 D. By turning the screw A the tension of the spring A may be regulated, as desired, to determine the amount of steam-pressure required to move the thimble-valve B, so as to permit of the escape of steam, as already specified.

Referring more specifically to the construction of the thimble-valve B, as shown in the drawings, it will be observed as consisting of a tube or cylinder of metal closed by a screwcap, B within which fits the packing U, which impinges against the exit-opening of the ventstem A. I prefer making this end B removable, so as to admit of quick and ready examination of the valve, and to enable any repair or replacement of packing C, or other parts that might be required.

It will also be seen that I form a slot, D, in the valve B for the reception of the short arm of the lever 1), all of which is shown in Fig. 4, which is a dissected view of my device.

What I claim is- 1. The combination, with a vent-stem, of a cylindrical or thinlble valve, provided with a I slot and detachable end, and a weighted lever,

HENRY 0. MONTGOMERY.

Witnesses JNO. CROW'ELL, Jr., \VILLARD FRAGKER. 

